make methods indy-ready

instrumentation/methods/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/methods/MethodInstrumentation.java

@@ -25,7 +25,9 @@
 import io.opentelemetry.javaagent.extension.instrumentation.TypeTransformer;
 import java.util.Collection;
 import java.util.Map;
+import javax.annotation.Nullable;
 import net.bytebuddy.asm.Advice;
+import net.bytebuddy.asm.Advice.AssignReturned;
 import net.bytebuddy.description.enumeration.EnumerationDescription;
 import net.bytebuddy.description.type.TypeDescription;
 import net.bytebuddy.implementation.bytecode.assign.Assigner;
@@ -91,42 +93,60 @@ public void transform(TypeTransformer transformer) {
   @SuppressWarnings("unused")
   public static class MethodAdvice {
 
+    public static class AdviceScope {
+      private final MethodAndType classAndMethod;
+      private final Context context;
+      private final Scope scope;
+
+      private AdviceScope(MethodAndType classAndMethod, Context context, Scope scope) {
+        this.classAndMethod = classAndMethod;
+        this.context = context;
+        this.scope = scope;
+      }
+
+      @Nullable
+      public static AdviceScope start(
+          SpanKind spanKind, Class<?> declaringClass, String methodName) {
+        Context parentContext = currentContext();
+        MethodAndType methodAndType =
+            MethodAndType.create(ClassAndMethod.create(declaringClass, methodName), spanKind);
+
+        if (!instrumenter().shouldStart(parentContext, methodAndType)) {
+          return null;
+        }
+        Context context = instrumenter().start(parentContext, methodAndType);
+        return new AdviceScope(methodAndType, context, context.makeCurrent());
+      }
+
+      public Object end(
+          Class<?> methodReturnType, Object returnValue, @Nullable Throwable throwable) {
+        scope.close();
+        return AsyncOperationEndSupport.create(instrumenter(), Void.class, methodReturnType)
+            .asyncEnd(context, classAndMethod, returnValue, throwable);
+      }
+    }
+
+    @Nullable
     @Advice.OnMethodEnter(suppress = Throwable.class)
-    public static void onEnter(
+    public static AdviceScope onEnter(
         @MethodSpanKind SpanKind spanKind,
         @Advice.Origin("#t") Class<?> declaringClass,
-        @Advice.Origin("#m") String methodName,
-        @Advice.Local("otelMethod") MethodAndType classAndMethod,
-        @Advice.Local("otelContext") Context context,
-        @Advice.Local("otelScope") Scope scope) {
-      Context parentContext = currentContext();
-      classAndMethod =
-          MethodAndType.create(ClassAndMethod.create(declaringClass, methodName), spanKind);
-
-      if (!instrumenter().shouldStart(parentContext, classAndMethod)) {
-        return;
-      }
-
-      context = instrumenter().start(parentContext, classAndMethod);
-      scope = context.makeCurrent();
+        @Advice.Origin("#m") String methodName) {
+      return AdviceScope.start(spanKind, declaringClass, methodName);
     }
 
+    @AssignReturned.ToReturned
     @Advice.OnMethodExit(onThrowable = Throwable.class, suppress = Throwable.class)
-    public static void stopSpan(
+    public static Object stopSpan(
         @MethodReturnType Class<?> methodReturnType,
-        @Advice.Local("otelMethod") MethodAndType classAndMethod,
-        @Advice.Local("otelContext") Context context,
-        @Advice.Local("otelScope") Scope scope,
-        @Advice.Return(typing = Assigner.Typing.DYNAMIC, readOnly = false) Object returnValue,
-        @Advice.Thrown Throwable throwable) {
-      if (scope == null) {
-        return;
-      }
-      scope.close();
+        @Advice.Return(typing = Assigner.Typing.DYNAMIC) Object returnValue,
+        @Advice.Thrown @Nullable Throwable throwable,
+        @Advice.Enter @Nullable AdviceScope adviceScope) {
 
-      returnValue =
-          AsyncOperationEndSupport.create(instrumenter(), Void.class, methodReturnType)
-              .asyncEnd(context, classAndMethod, returnValue, throwable);
+      if (adviceScope != null) {
+        return adviceScope.end(methodReturnType, returnValue, throwable);
+      }
+      return returnValue;
     }
   }
 }

instrumentation/methods/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/methods/MethodInstrumentationModule.java

@@ -15,14 +15,16 @@
 import io.opentelemetry.javaagent.bootstrap.internal.AgentInstrumentationConfig;
 import io.opentelemetry.javaagent.extension.instrumentation.InstrumentationModule;
 import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
+import io.opentelemetry.javaagent.extension.instrumentation.internal.ExperimentalInstrumentationModule;
 import io.opentelemetry.javaagent.tooling.config.MethodsConfigurationParser;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.stream.Collectors;
 
 @AutoService(InstrumentationModule.class)
-public class MethodInstrumentationModule extends InstrumentationModule {
+public class MethodInstrumentationModule extends InstrumentationModule
+    implements ExperimentalInstrumentationModule {
 
   private static final String TRACE_METHODS_CONFIG = "otel.instrumentation.methods.include";
 
@@ -66,4 +68,9 @@ private static List<TypeInstrumentation> parseConfigProperties() {
   public List<TypeInstrumentation> typeInstrumentations() {
     return typeInstrumentations;
   }
+
+  @Override
+  public boolean isIndyReady() {
+    return true;
+  }
 }